/*
 * Released under BSD License
 * Copyright (c) 2019-2020 Allen_sun_js@hotmail.com
 *
 * Project Home:
 *  https://github.com/allensunjian
 */

(function ($w, temp) {
  var Jm = $w[temp]

  var name = 'menu'

  var $d = $w['document']

  var menuEvent = 'oncontextmenu'

  var clickEvent = 'onclick'

  var overEvent = 'mouseover'

  var $c = function (tag) { return $d.createElement(tag) }

  var _noop = function () { }

  var logger = (typeof console === 'undefined') ? {

    log: _noop, debug: _noop, error: _noop, warn: _noop, info: _noop

  } : console

  var $t = function (n, t) { if (n.hasChildNodes()) { n.firstChild.nodeValue = t } else { n.appendChild($d.createTextNode(t)) } }

  var $h = function (n, t) {
    if (t instanceof HTMLElement) {
      t.innerHTML = ''
      n.appendChild(t)
    } else {
      n.innerHTML = t
    }
  }

  if (!Jm || Jm[name]) return

  Jm.menu = function (_jm) {
    this._get_menu_options(_jm, function () {
      this.init(_jm)

      this._mount_events()
    })
  }
  Jm.menu.prototype = {

    defaultDataMap: {
      funcMap: {
        edit: {
          isDepNode: true,
          // defaultFn不受到中台变量的控制，始终会先于fn去执行
          defaultFn: function (node) {
            var f = this._menu_default_mind_methods._menu_begin_edit.call(this.jm)
            f && this._menu_default_mind_methods._menu_edit_node_begin(this.jm.view, node)
          },
          fn: _noop,
          text: 'edit node'
        },
        addChild: {
          isDepNode: true,
          fn: function (nodeid, text) {
            var selected_node = this.get_selected_node()
            if (selected_node) {
              var node = this.add_node(selected_node, nodeid, text)
              if (node) {
                this.select_node(nodeid)
                this.begin_edit(nodeid)
              }
            }
          },
          text: 'append child'
        },
        addBrother: {
          isDepNode: true,
          fn: function (nodeid, text) {
            var selected_node = this.get_selected_node()
            if (!!selected_node && !selected_node.isroot) {
              var node = this.insert_node_after(selected_node, nodeid, text)
              if (node) {
                this.select_node(nodeid)
                this.begin_edit(nodeid)
              }
            }
          },
          text: 'append brother'
        },
        delete: {
          isDepNode: true,
          fn: function () {
            this.shortcut.handle_delnode.call(this.shortcut, this)
          },
          text: 'delete node'
        },
        showAll: {
          sDepNode: false,
          fn: function () {
            this.expand_all(this)
          },
          text: 'show all'
        },
        hideAll: {
          isDepNode: false,
          fn: function () {
            this.collapse_all(this)
          },
          text: 'hide all'
        },
        screenshot: {
          isDepNode: false,
          fn: function () {
            if (!this.screenshot) {
              logger.error('[jsmind] screenshot dependent on jsmind.screenshot.js !')
              return
            }
            this.screenshot.shootDownload()
          },
          text: 'load mind picture'
        },
        showNode: {
          isDepNode: true,
          fn: function (node) {
            this.expand_node(node)
          },
          text: 'show target node'
        },
        hideNode: {
          isDepNode: true,
          fn: function (node) {
            this.collapse_node(node)
          },
          text: 'hide target node'
        }
      },
      menuStl: {
        'width': '150px',
        'padding': '12px 0',
        'position': 'fixed',
        'z-index': '10',
        'background': '#fff',
        'box-shadow': '0 2px 12px 0 rgba(0,0,0,0.1)',
        'border-radius': '5px',
        'font-size': '12px',
        'display': 'none'
      },
      menuItemStl: {
        padding: '5px 15px',
        cursor: 'pointer',
        display: 'block',
        'text-align': 'center',
        'transition': 'all .2s'
      },
      injectionList: ['edit', 'addChild', 'delete']
    },

    init: function (_jm) {
      this._create_menu(_jm)
      this._get_injectionList(_jm)
      this.menuOpts.switchMidStage && Jm.util.dom.add_event(_jm.view.e_editor, 'blur', function (e) {
        this._menu_default_mind_methods._menu_edit_node_end.call(_jm.view)
        if (typeof this.menuOpts.editCaller === 'function') {
          this.menuOpts.editCaller($w.menu._update_node_info, this._menu_default_mind_methods._menu_update_edit_node)
          return
        }
        this._menu_default_mind_methods._menu_update_edit_node()
      }.bind(this))
    },

    _event_contextMenu (e) {
      e.preventDefault()
      this.menu.style.left = e.clientX + 'px'
      this.menu.style.top = e.clientY + 'px'
      this.menu.style.display = 'block'
      this.selected_node = this.jm.get_selected_node()
    },

    _event_hideMenu () {
      this.menu.style.display = 'none'
    },

    _mount_events () {
      $w[menuEvent] = this._event_contextMenu.bind(this)
      $w[clickEvent] = this._event_hideMenu.bind(this)
    },

    _create_menu (_jm) {
      var d = $c('menu')
      this._set_menu_wrap_syl(d)
      this.menu = d
      this.e_panel = _jm.view.e_panel
      this.e_panel.appendChild(d)
    },

    _create_menu_item (j, text, fn, isDepNode, cb, defaultFn) {
      var d = $c('menu-item'); var _this = this
      this._set_menu_item_syl(d)
      d.innerText = text
      d.addEventListener('click', function () {
        if (this.selected_node || !isDepNode) {
          defaultFn.call(_this, this.selected_node)
          if (!_this._get_mid_opts()) {
            cb(this.selected_node, _noop)
            fn.call(j, Jm.util.uuid.newid(), this.menuOpts.newNodeText || '请输入节点名称')
            return
          }
          cb(this.selected_node, _this._mid_stage_next(function () {
            var retArgs = [this.selected_node]
            var argus = Array.prototype.slice.call(arguments[0], 0)
            argus[1] = this.menuOpts.newNodeText || '请输入节点名称'
            if (argus[0]) {
              retArgs = argus
            }
            fn.apply(j, retArgs)
          }.bind(this)))
          return
        }
        alert(this.menuOpts.tipContent || 'Continue with node selected！')
      }.bind(this))
      d.addEventListener('mouseover', function () {
        d.style.background = 'rgb(179, 216, 255)'
      })
      d.addEventListener('mouseleave', function () {
        d.style.background = '#fff'
      })
      return d
    },

    _set_menu_wrap_syl (d) {
      var os = this._get_option_sty('menu', this._get_mixin_sty)
      d.style.cssText = this._format_cssText(os)
    },

    _set_menu_item_syl (d) {
      var os = this._get_option_sty('menuItem', this._get_mixin_sty)
      d.style.cssText = this._format_cssText(os)
    },

    _format_cssText (o) {
      var text = ''
      Object.keys(o).forEach(function (k) {
        text += k + ':' + o[k] + ';'
      })
      return text
    },

    _empty_object (o) {
      return Object.keys(o).length == 0
    },

    _get_option_sty (type, fn) {
      var sty = this.menuOpts.style
      var menu = this.defaultDataMap.menuStl
      var menuItem = this.defaultDataMap.menuItemStl
      var o = {menu, menuItem}
      if (!sty) return o[type]
      if (!sty[type]) return o[type]
      if (!sty[type] || this._empty_object(sty[type])) return o[type]
      return fn(o[type], sty[type])
    },

    _get_mixin_sty (dSty, oSty) {
      var o = {}
      Object.keys(oSty).forEach(function (k) {
        o[k] = oSty[k]
      })
      Object.keys(dSty).forEach(function (k) {
        if (!o[k]) o[k] = dSty[k]
      })
      return o
    },

    _get_menu_options (j, fn) {
      var options = j.options
      if (!options.menuOpts) return
      if (!options.menuOpts.showMenu) return
      this.menuOpts = j.options.menuOpts
      fn.call(this)
    },

    _get_injectionDetail () {
      var iLs = this.menuOpts.injectionList
      var dLs = this.defaultDataMap.injectionList
      if (!iLs) return dLs
      if (!Array.isArray(iLs)) {
        logger.error('[jsmind] injectionList must be a Array')
        return
      }
      if (iLs.length == 0) return dLs
      return iLs
    },

    _get_injectionList (j) {
      var list = this._get_injectionDetail()
      var _this = this
      list.forEach(function (k) {
        var o = null
        var text = ''
        var callback = _noop
        var defaultFn = _noop

        if (typeof k === 'object') {
          o = _this.defaultDataMap.funcMap[k.target]
          text = k.text
          k.callback && (callback = k.callback)
        } else {
          o = _this.defaultDataMap.funcMap[k]
          text = o.text
        }

        if (o.defaultFn) defaultFn = o.defaultFn
        _this.menu.appendChild(_this._create_menu_item(j, text, o.fn, o.isDepNode, callback, defaultFn))
      })
    },

    _get_mid_opts () {
      var b = this.menuOpts.switchMidStage
      if (!b) return false
      if (typeof b !== 'boolean') {
        logger.error('[jsmind] switchMidStage must be Boolean')
        return false
      }
      return b
    },

    _switch_view_db_event (b, jm) {
      Jm.prototype.dblclick_handle = _noop
      Jm.shortcut_provider.prototype.handler = _noop
      Jm.view_provider.prototype.edit_node_end = _noop
    },

    _mid_stage_next (fn) {
      return function () {
        fn(arguments)
      }
    },

    _reset_mind_event_edit () {},

    _menu_default_mind_methods: {
      _menu_begin_edit: function () {
        var f = this.get_editable()
        if (!f) {
          logger.error('fail, this mind map is not editable.')
        };
        return f
      },
      _menu_edit_node_begin (scope, node) {
        if (!node.topic) {
          logger.warn("don't edit image nodes")
          return
        }
        if (scope.editing_node != null) {
          this._menu_default_mind_methods._menu_edit_node_end.call(scope)
        }
        scope.editing_node = node
        var view_data = node._data.view
        var element = view_data.element
        var topic = node.topic
        var ncs = getComputedStyle(element)
        scope.e_editor.value = topic
        scope.e_editor.style.width = (element.clientWidth - parseInt(ncs.getPropertyValue('padding-left')) - parseInt(ncs.getPropertyValue('padding-right'))) + 'px'
        element.innerHTML = ''
        element.appendChild(scope.e_editor)
        element.style.zIndex = 5
        scope.e_editor.focus()
        scope.e_editor.select()
      },
      _menu_edit_node_end: function () {
        if (this.editing_node != null) {
          var node = this.editing_node
          this.editing_node = null
          var view_data = node._data.view
          var element = view_data.element
          var topic = this.e_editor.value
          element.style.zIndex = 'auto'
          element.removeChild(this.e_editor)
          $w.menu._update_node_info = {id: node.id, topic: topic}
          if (Jm.util.text.is_empty(topic) || node.topic === topic) {
            if (this.opts.support_html) {
              $h(element, node.topic)
            } else {
              $t(element, node.topic)
            }
          }
        }
      },
      _menu_update_edit_node: function () {
        var info = $w.menu._update_node_info
        $w.menu.jm.update_node(info.id, info.topic)
      }
    }

  }
  var plugin = new Jm.plugin('menu', function (_jm) {
    $w.menu = new Jm.menu(_jm)

    menu.jm = _jm

    if (menu.menuOpts) _jm.menu = menu
  })

  Jm.register_plugin(plugin)

  function preventMindEventDefault () {
    Jm.menu.prototype._switch_view_db_event()
  }
  Jm.preventMindEventDefault = preventMindEventDefault
})(window, 'jsMind')
